Water-cooled lamp



April 7, 1931. L. J. BUTTOLPH WATER COOLED LAMP Filed Nov. 28, 1923 INVENTOR Patented Apr. 7, 1931 UNITED STATES PATENT OFFICE LEROY J. BUTTOLPH, OF EAST ORANGE, NEW JERSEY, ASSIGNOR TO GENERAL ELECTRIC VAPOR LAMP COMPANY, OF HOBOKEN, NEW JERSEY, A CORPORATION OF NEW JERSEY WATER-COOLED LAMP Application filed November 28, 1923. Serial No. 677,578.

The present invention relates to an electric light radiating apparatus useful in the arts generally and particularly in the therapeutic art where diseases are treated by means of radiations from a light source giving off ultra violet rays and has for its object to provide such an apparatus which can be manipulated readily by hand by the operator.

I have discovered, when operating a quartz lamp having a solid anode and a liquid cathode therein and an arc path of one or two inches, that it is impossible to maintain such a small sized lamp in eflicient operation on commercial circuits without the use of external heat radiating devices. Accordingly,

in my new apparatus, I surround'the lamp with a cooling device operating to maintain the temperature of the radiant current stream between the electrodes at the desired operating temperature for giving the maximum amount of light, in those cases where illumination is desired, and the maximum quantity of ultra violet radiations in those cases where such radiations are desired.

By availing of the cooling means for the luminous column and the terminals or electrode portions of the lamp, I am enabled to make efficient devices of large and small sizes and the invention lends itself particularly to the production of a smallhand lamp for use as a therapeutic lamp or' a bulls eye lamp, although it is to be understood that my invention is not limited to small sized outfits.

For cooling my lamp I employ a casting which has an opening therethrough in which is mounted a lamp suitable to the purpose and way from the lamp to the exterior. Within the cooling casting is provided a water or other fluid circulating passageway which serves to carry off heat passed to it from the lamp by means of the said casting. It is here noted that although I call my lamp a water cooled lamp water is not the only suitable means for cooling the casting as a stream of air or oil or some other fluid can be used, water being herein used as a preferred means. The lamp is provided with suitable enclosures for the parts and with other appurtenances as herein fully disclosed and shown in the drawings in which- Fig. 1 is a perspective view of my lamp assembled, but without end caps thereon.

Fig. 2 is a horizontal section along lines 2-2 of Fig. 4 looking inthe direction of the arrows.

Fig. 3 is a horizontal section along line 33 in Figure 4.

Fig. 4 is a vertical section through the lamp outfit along the axis of the lamp from front to back, and

Fig. 5 is a detail of a top closure or cap for the lamp outfit.

In the drawings the casting 1 which is of a substantially semi-cylindrical shape has extending therethrough parallel to its axis the opening 2 which is made to conform in contour to the shape of the lamp 3, the lower part thereof as shown being of greater cross section than the upper part. Within the casting and contiguous to the front face 4 thereof isthe cavity 5 which extends substantially the length of and across the casting. A light conducting passageway 6 extends from said lamp opening 2 to the front face 4. The water conducting passageways 7 and 8 serve to conduct cooling fluid to and from said cavity 5 and the partition 9 extending from the top of cavity 5 to the juncture thereof with passageway 6 serves to distribute the cooling fluid within said cavity and to secure eflicient cooling thereby. The lenses 10 and 11,

mounted in passageway 6 between the cavity and face 4 and between cavity 5 and opening 2, respectively, serve as a part of the walls which alsohas a light conducting p g of the water conducting cavity 5 and at the same time permit of the passage of light from the lamp 3 to the exterior of the casting. The substantially semi-cylindrical shell 12 serves to enclose the back of the casting and the water pipes and electrical conductors for the lamp 3 and the water passageway as hereinafter more fully described. The handle 13 which is attached to shell 12 carries therethrough the water conducting pipes 14 and 15 which connect through pipes 16 and 17, which are between the shell 12 and the casting 1, to the water passageways 7 and 8, respectively.

The handle 13 also carries therethrough the 23 and 24 serve to support the lamp-at the" bottom, they being made 7 of strong and slightly resilient material. The spring Clips 26 fixed to the top of casting 1 and bearing against the top of lamp 3 also serve to. support and space the lamp in the opening 2.

The top and bottom ends ofshell12 extend beyond the upper and lower extremities of casting 1 and lamp 3 and the conductors thereto, and together with top and-bottom caps 27 and 28, respectively, serveto inclose and protectgthe ends of the lamp and the. 0 .1.1- nections thereto asweljl'as to inclose the light atthese points. The aprons 219and 307on the caps 27 and 28, respectively, extend to the upper, and lowerends, respectively, of casting l at its front edge and serve to close thespaces between the castingand caps atthe; front thereof: The. sp ing 31 mounted. on. the inner side of bottom cap 28 aids in the holding and spacing oflamp 3;in opening The-pins, 32 fixed to casting 1 at each end-thereofand passingthrough caps 27 and 28 serve by .mcansof nuts 83: to secure said caps to the casting 1 and shell 12.-

lathe-manufacture; of my lamp I find that the casting 1' is best made of brass, copper, aluminum, or-a condensation product such as bakelite. The caps 27 and 2 8 I make of meta orbakolito, The sh ll- 2 is made o shoot metalsuch as of b ass, aluminiuasorthc like and is fixed at the front, edges-thereof;to the casting 1- bysome suitable means as by Wel ng, w r th s m lar mo ns;-

While I; have described the constru tion of my: d ic as inga casti g it. is to be. understood that-it can be made up byworkjers; in the sheet metal art equally well.

I claim as my invention V 1 1; n ater-cooled mp, ncombination, a lirlr ot ast ng ha i g-avcr i sl openhis there h gh f a lamp, @1- a erci culating a i y q ho fa oof said s id asting, a; ght ondueti g opening" thr ugh. said r ic l-opening to said cavi y, a opening hroug id avity to the out ide. of ai cas ng nd gistering; w th: sait t ight coir ductingop ni g, a ens a ross-said lightzconducting-opening, a lensa lfoss said'registerngpe ng, ai enses-ha ing water.- tight sea s b e v h mancl e asting, nd-fluid ondu ing pa ag s -and'from saidcavityn a Wa er o d lamp, n omb nation, a l m tal as i g ha ing a ortical open- 11 g ther through. for a lamp, Water; circa a i g cavity i he fa e of said. solidcasting, a; l ght: conducting opening through said vve tical.- oponing to; aid cavity, an opening through said cavity to the outside of said casting and registering with said light conducting openings, a partition across said cavity and extending from one end of said cavity to said openings, a lens across said light,- conducting opening, a lens across said registering opening, saidlenseshaving water tight seals between them and the casting, and flu d conducting passages toand from said cavity.

3. In a water cooled lamp, in combination, a solid metal casting having an opening therethrough for a lamp, a water circulating cavity in the faceof said solid casting, a light conducting opening through said openingto. said: cavity, an open ng through said cavity tothe-ontsicle ofsa d casting-androgistering w th said lightconducting opening, alens across saidlight conducti g ope g, a le s; acro s aid. reg s er ng pening, said lenses having water tight'seals between; them and the casting-,- and fluid conducting pa sages to andfrom said-cavity.

4t, l a a cr o ed-lamnli co bination,

l ctr c ampmo-untod Wit in asolid casting, alight conductingpassageway through the, casting from said lamp to theexterior of the casti g, and aflu d liumattho face. of said casting o coo-ling sa d. casting.-

5- In awa er cooled lamp, in combi ati n, a semiylin r cal: single wall casting hav ing an electr lampl o-ldi g openingthe hr ugh parallel to ts axi anda lamp in aid opening, a cavity within said casting con,- tigli usto the p ane side thereof, alight conducting passago ay from; said opening: to ai lpla iosit e, a; len across said passag way-between saidcavity and said plane side,

a lens across saidpassageway between said a tyand said; amp holding pening, said lenses having watertight'seals betweenjthem and the casting, waterconducting passage- Ways to and'from-sa 'd: cav ty, a substantial y sem -cylindrical casingabout" the rear; por

tionof saidcastingextending above andbelowthelowerextremities thereof, an upper cap, and a lower cap for said casing having aprons extending therefrom at the front thereof to. saidcasting, a handle for said 'cas- 111g, water conducting pipes passing through saidhandle and through the space between 821d casingand'said casting to the watercoucluct ng p s ge y i said. casting, and electric conductors passing through said handle and through the space between said casing and casting tothe terminals of the lamp, said conductors forming within said space supportingmeans for said 'lamp.

6. In awater cooled lamp, in combination. a semi cylindrical single wall castinghaving an electric; lamp holding opening therethrough-parallel to-. its aX:is and a lam-pin sa1d opc ning, a cavity within said casting contlngu-ous to; the. plane side thereof", alight conducting passageway from said; opening to said plane side, a lens across said passageway between said cavity and said plane side, a lens across said passageway between said cavity and said lamp holding opening, said lenses having water tight seals between them and the casting, water conducting passageways to and from said cavity, a substantially semi-cylindrical casing about the rear portion of said casting extending above and below the lower extremities thereof, an upper cap and a lower cap for said casing having aprons extending therefrom at the front thereof to said casting, a handle for said casing, water conducting pipes passing through said handle and through the space between said casing and said cast-ing to the water conducting passageways in said casting, electric conductors passing through said handle and through the space between said casing and casting to the terminals of the lamp, said conductors forming within said space supporting means for said lamp, and an auxiliary supporting means for said lamp on the inner surface of one of said caps.

7. In a water cooled lamp, in combination, a semi-cylindrical single wall casting having an electric lamp holding opening therethrough parallel to its axis and a lamp in said opening, a cavity within said casting contiguous to the plane side thereof, a light conducting passageway from said opening to said plane side, a lens across said passageway between said cavity and said plane side, a lens across said passageway between said cavity and said lamp holding opening, said lenses iaving water tight seals between them and the casting, water conducting passageways to and from said cavity, a substantially semicylindrical casing about the rear portion of said casting extending above and below the lower extremities thereof, an upper cap and a lower cap for said casing having aprons extending therefrom, at the front thereof to said casting, a handle for said casing, water conducting pipes passing through said handle and through the space between said casing and said casting to the water conducting passageways in said casting, electric conductors passing through said handle and through the space between said casing and casting to the terminals of the lamp, said conductors forming within said space supporting means for said lamp, and means on said casting for securing said caps on said casing.

8. In a water cooled lamp, in combination, a semi-cylindrical single wall casting having an electric lamp holding opening therethrough parallel to its axis and a lamp in said opening, a cavity within said casting contiguous to the plane side thereof, a light conducting passageway from said opening to said plane side, a lens across said passageway between said cavity and said plane side, a lens across said passgeway between said cavity and said lamp holding opening, said lenses having water tight seals between them and the casting, water conducting passageways to and from said cavity, a substantially semi-cylindrical casing about the rear portion of said casting extending above and below the lower extremities thereof, an upper cap and a lower cap for said casing having aprons extending therefrom at the front thereof to said casting, and a handle for said casing, water conducting pipes passing through said handle and through the space between said casing and said casting to the water conducting passageways in said casting, electric conductors passing through said handle and through the space between said casing and casting to the terminals of the lamp, said conductors forming within said space supporting means for said lamp and pins extending from said casting through said caps having threads and nuts thereon for securing said caps.

Signed at Hoboken, in the county of End son and State of New Jersey, this 27th day of November, A. D. 1923.

LEROY J. BUTTOLPH. 

